# -*- codeing = utf-8 -*-
# @Time: 2021/9/12 12:48
# @Author: Ivan
# @File: math_module.py
# @Software: PyCharm

def add(a, b):
    return a + b

def sub(a, b):
    return a - b

def multi(a, b):
    return a * b

def devide(a, b):
    return a / b

